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This paper presents the scenario that gravitational waves, generated incore-collapse of a pre-supernova star, can produce both electromagneticradiation and sound radiation as gravitational waves propagate outward from thecollapsing core. While the energy of this co-produced electromagnetic and soundradiation is orders of magnitude smaller than the initiating gravitationalradiation, the power may be sufficient to re-ignite fusion outside thecollapsing core. The non-equilibrium re-ignition of fusion, in roughly the sametime frame as the strongest neutrino emissions, would change the configurationof the pre-supernova star and subsequently the ejecta and the evolution of thestellar expansion of the supernova remnant. Although the co-producedelectromagnetic or sound radiation could not contribute directly to thesupernova explosion, the associated non-equilibrium re-ignition of fusion wouldalter the state outside the core leaving an observable signature in the ejectaof the supernova remnant. The aim of this paper is to argue that including thishypothesized co-produced radiation in computational models of core collapsesupernovae would contribute to the evolution of the stellar expansion andconsequently should be observable in the supernovae remnant, providing aconfirmation of the conversion processes for gravitational radiation toelectromagnetic and sound radiation.

Signatures of electromagnetic and sound radiation produced by gravitational waves in core-collapse supernovae